EX188 Container Image Building Practice Question
You are using a multi-stage build in your Containerfile. How do you copy a compiled binary named 'app' from a build stage named 'builder' into your final production runtime stage?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
COPY --from=builder /app /app
The COPY --from=<stage_name> instruction allows copying artifacts from previous named stages.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
COPY --stage=builder /app /app
Why it's wrong here
The correct flag is --from, not --stage.
- ✗
ADD --stage-name=builder /app /app
Why it's wrong here
ADD does not take a --stage-name flag.
- ✗
IMPORT --from=builder /app /app
Why it's wrong here
IMPORT is not a valid Containerfile instruction.
- ✓
COPY --from=builder /app /app
Why this is correct
--from=builder specifies copying from the stage labeled 'builder'.
About these practice questions
This EX188 question is part of Courseiva's 296-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Red Hat exam blueprint
This EX188 practice question is part of Courseiva's free Red Hat certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the EX188 exam.